Etching device for offset printing machine



FIG. 1 is a left side elevational view of an etching device for offset printing machine showing our new design;

FIG. 2 is a front elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a right side elevational view;

FIG. 6 is a rear view; and

FIG. 7 is a front and left side perspective view. 

The ornamental design for an etching device for offset printing machine, as shown. 